Allowable point load to existing post tensioned concrete slab
Allowable point load to existing post tensioned concrete slab
(OP)
I am located in Southern California and I am working on a single story residential remodel project. The house was built in 1984 and the concrete slab is post tensioned verified by the post tensioned slab note posted in the garage.
So I realize that there are many factors that determine the allowable point loads to a p.t. slab but I am just looking for some input as to an acceptable max point load that you would feel comfortable allowing at an interior portion of a p.t. slab for single story residential construction.
Basically the owner is eliminating a bearing wall and I am supporting the roof and ceiling framing with 2 new beams as to open up the area. There will be two new interior posts one with a total point load of 3.0kips dead & roof live load & the other total dl & Lr = 4.5kips.
I seem to remember another engineer telling me that a point load to a p.t. concrete slab for residential construction in S-Calif under 6 kips would be acceptable, but I am not 100% sure.
So I realize that there are many factors that determine the allowable point loads to a p.t. slab but I am just looking for some input as to an acceptable max point load that you would feel comfortable allowing at an interior portion of a p.t. slab for single story residential construction.
Basically the owner is eliminating a bearing wall and I am supporting the roof and ceiling framing with 2 new beams as to open up the area. There will be two new interior posts one with a total point load of 3.0kips dead & roof live load & the other total dl & Lr = 4.5kips.
I seem to remember another engineer telling me that a point load to a p.t. concrete slab for residential construction in S-Calif under 6 kips would be acceptable, but I am not 100% sure.






RE: Allowable point load to existing post tensioned concrete slab
Here's a good article:
http://www.structuremag.org/wp-content/uploads/201...
RE: Allowable point load to existing post tensioned concrete slab
RE: Allowable point load to existing post tensioned concrete slab
You can look at other buildings or reports that you've seen nearby or maybe contact a geotech to see what they think of the area. If your load was 10x what you're thinking about I'd go through with some investigation.
Since you're in California, I'd be more worried about losing a portion of your lateral load resisting system. Is that bearing wall a shear wall?
RE: Allowable point load to existing post tensioned concrete slab